Sheet-metal roofing



(No Model.)

B NORTON SHEET METAL ROOFING.

Patented Oct. 18, 1-892.

n n e m J W M. M Q

RRIS Penna 00., P145704.

" UNITED STATES PATENT OFFICE.

EDWIN NORTON, OF MAYWOOD, ASSIGNOR TO HIMSELF, AND OLIVER W. NORTON, OF CHICAGO, ILLINOIS.

SHEET-METAL ROOFING.

SPECIFICATION formingpart Of Letters Patent No. 484,640, dated October 18, 1892.

Application filed April 18, 1892. Serial No. 429,532. (No model.)

To all whom it may concern.

Be it known that I, EDWIN NORTON, a citizen of the United States, residing in Maywood, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Sheet-Metal Roofing, of which the following is a specification.

My invention relates to the construction of sheet-metal roofs of the class that are made of tin or terne platesthat is to say, thin soft pliable sheets of steel or iron coated on both sides with pure tin or lead or other metal, the meeting edges of the plates being soldered or seamed together. I have discovered that the life or durability of this class of roofs may be doubled or very greatly increased by furnishing the under side of the sheet which lies upon or comes in contact With the roofingboards with a coating of enamel. In practicing my invention the tin or terne roofing plates or sheets are first enameled on one side, this being done by painting or coating one side of the sheet with a paint composed, preferably, of oil and red lead or other suitable paint, and then baking the sheets thus coated or painted in an oven. The roofing-sheets thus constructed are laid with their enameled side down in making the roof and their meeting edges seamed and soldered together. As the enameled side of the roofing-plate will not take the solder, the soldered seam is formed at the inner angle of the upright flange, or the edge of one of the sheets may be folded upon itself to bring its metallic surface in contact with the adjoining sheet for soldering.

In the accompanying drawings, forming a part of this specification, and in which similar letters of reference indicate like parts, Figure 1 is a perspective View of a section or portion of a roof embodying my invention. Fig. 2 is an enlarged cross-section in which the thickness of the sheets and their coating is exaggerated for sake of clearness. Fig. 3 is a perspective view of one of my improved roofing-plates. the seam.

In the drawings, A represents the roofing boards or surface upon which the metallic roofing-plates are to be laid.

B represents my improved roofing plates or Fig. 4 shows another form of sheets, the same being composed of thin soft pliable sheets of iron or steel b, furnished with a tin, lead, or other metallic coating 1), imposed upon which, upon one side, is a coating of enamel 12 The enamel-coated side of the sheet is laid down next to the roofing-boards and serves to efiectually protect the metal of the sheet from all moisture or acids that may be in the wood or bed surface A upon which the sheets are laid. This enameled coating 1) on the under side of the sheet effectually prevents all oxidation or deterioration of the iron or steel sheets I) and of its tin, lead, or other metallic coating 17' from the under side and operates to practically double or very greatly increase the ordinary life of the roof ing plate.

The meeting edges of the sheets B B are secured together by a soldered seam b the sheets being provided with overlapping flanges b If". The soldered seam may be located at the inner angle b formed by the upright flanges b and the overlapping flange b, or, if preferred, one of the two adjoining sheets B B may be furnished with a fold b at its edge, so as to bring the metallic or unenameled side of such fold outermost at the soldered joint b Both forms of the soldered joint are clearly indicated in the drawings. By this high degree of heat, to which the paint is sub jected in the baking operation to form the enamel coating, the paint becomes amalgamated or intimately united with the metal surface, so that the sheet may be folded or bent as required in making the seams without cracking or scaling off the enamel coating, and so that this coating cannot be rubbed or scraped off by ordinary usuage in the roof under expansion and contraction.

I claim- 1. The improved roof herein shown and described and consisting of thin soft pliable sheets of steel or iron coated with tin, lead, or other suitable metal and furnished on the under side with a flexible coating of enamel formed by coating the sheets with paint and then baking the same, the meeting edges of said sheets being united by a soldered seam, substantially as specified.

2. The combination, with the roofing-boards or bed-surface A, of roofing-plates B, com- ICO pdsed of iron or steel sheets I), having theme-3 iron on steel sheets I), coated with tin or other tallic coating b* of tin, lead, ov ot henmetal; metah b and provided with a flexible enamand provided with a flexible enameled coateled'coating b on the under side of the sheet ing 12 on the under side of said sheets formed formed by coating the sheets with paint and 5 by coating the sheets with paint and then then baking the same, substantially as speci- I5 baking the same, said roofing-plates having fied.

at their meeting edges overlappingflanges 11 EDWIN NORTON. b substantially as specified. Witnesses:

3. The improved roofing plates herein H. M. MUNDAY, 10 shown and described, consisting. of thin. soft EDW. S. EVARTS. 

